Acetylene-gas-generating lamp.



Patented July 2, I901. W. P. CRABY.

ACETYLENE GAS GENERATING LAMP.

(Application filed Dec. I8, 1699. Benewgd Dec. 31, 1900.)

(No Model.)

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llNrTED STATES PATENT QEEICE.

ILLIAM P. ORARY, OF NEW YORK, N. Y.

ACETYLENE-GAS-GENERATING LAMP.

SPECIFICATION formingpart of Letters Patent No. 677,400, dated July 2,1901. Application filed December 18,1899. Renewed December 31, 1900.Serial No. 41,730. (No model.)

To (0Z5 whom it mag concern:

Be it known that 1, WILLIAM P. CRARY, a citizen of the United States,residing in the city of New York, borough of Manhattan, in the countyand State of New York, have invented a certain new and usefulImprovement in Acetylene-Lamps, of which the following is aspecification.

The invention relates more particularly to bicycle and driving lamps;and its objectis to simplify the construction and operation and increasethe efficiency of the lamp.

The water-tube extends downward from the water-chamber and serves with atubular nut at the lower end in holding the carbidcup in close contactwith its cover to form the gaschamber. The nut also serves indistributing the water-supply from the tube.

The invention also consists in'an improved mechanism for controlling thewater-supply, and in certain details of construction and arrangement ofparts to be hereinafter.described.

The accompanying drawings form a part of this specification and show theinvention as I have carried it out.

Figure 1 is a vertical central section through a bicycle-lamp, certainportions being shown in elevation and some of the parts merely-indicatedby dotted lines. Fig. 2 is a transverse section taken on the line 2 2 inFig. 1. The remaining figures are on a larger scale. Fig. 3 is a planview showing the controlling devices, and Fig. 4 is a correspondingvertical section. Fig. 5 is an elevation, partly in vertical section,showing the retaining-nut.

Similar letters of reference indicate the same parts in all the figures.

A is the water chamber, spheroidal in shape, having a conical extensionA below the bottom, terminating in a ring or skirt A receiving the openupper end of the carbidcup 13 and forming with the latter a gaschamber0, communicating through a lateral pipe A with an upright tube A,carrying at its upper end a burner A inclosed within a hood A, joined tothe water-chamber on. the horizontal axial line by the screw A The hoodis equipped with'a reflector A and other necessary appurtenances, aswill be understood.

The water-tube is marked D. It is enlarged at the upper end at D andprojects a little above the upper surface of the waterchamber, to whichit is joined. The main portion is of small diameter and extends throughthe bottom of the water-chamber to a point near the bottom of thecarbid-cupB,where it terminates in a valve-seat d, and is screwthreadedexteriorly to receive a tubular thumb-nut E, extending through thebottom of the cup and holding the latterin position. A head A on theextension A forms an annular interior groove in whichis received arubber gasket F, held in position to receive the upper edge of the cupand insure a tight .joint when the thumb-nut is screwed up. To

guard against leakage below, I form a seat B around the central aperturein the bottom of the cup and apply a washer F between it and the head Eof the nut. The body of the nut is hollow and forms a recess 6 below theValveseat d, from which extend a series of small openings 6, allowingthe water passing the valve to escape to-the interior of the cup. ,Topreventthe entrance of spent carbid or other obstructions, I prefer tocoverthe holes 9 with a loosely -tied string 6 lying in the groove 6 asshown.

G is the valve-rod, inclosed in the tube D, terminating below in aconical plug G,matching tothe valve-seat d and moved vertically tocontrol the flow of water by the screwthreaded portion G matching theinteriorlyscrew-threaded portion D of the tube. The upper end of the rodis attached to a hollow cylindrical'head G received in the enlargedupper end D of the water-tube, and extends above the latter. Its openend is closed bya screw-cap G and the lower portion is cut away ateachside to allow water received in the head to flow to the interior ofthe tube and fill the water-chamber through the perforations d. The headcarries a notched flange G upon which is a ring H, having -a spur 11,adapted to engage in one of the notches g and held in engagement by anut J. The ring has an arm H extending laterally therefrom by which thehead aud its valve-rod maybe turned and is equipped with a spring Hprojecting downwardly and resting upon a flange D carried on theprojecting end D of the water-tube and having a series of notches C1 inwhich the spring may lightly engage to hold the arm H m the desiredposition. Stops d d on the flange limit the motion in both directionsfrom the closed to the fully-open condition of the valve.

13 B are upwardly-projecting spurs formed around the aperture in thebottom of the carbid-cup and serve to support a tube L, of perforatedsheet metal, inclosing the valve and nut and having an outer covering offabric L, serving to protect the water-orifices from the surroundingcarbid.

M is an annular disk or follower having a head M, abutting against theinterior of the extension A, and is forced downward by the spring M toperform the usual function of holding the carbid in place. \Vater fromthe chamber A flows through the holes d in the water-tube and passesunobstructedly as far as the screw G where it flows along the score orgroove g, provided for the purpose, to the valve-seat d, whence if thevalve be open it escapes to the interior of the tubular nut Eand-through the small openings 6', protected by the string a to theinterior of the foraminated tube L, and is thus slowly given to thesurrounding carbid.

To adjust the valve, the nut J is slackened and the ring H and its spurI-I disengaged from its notch d and shifted to another notch in thedirection to allow a greater or less amount of water to pass the valveand the nut is again tightened.

The bottom of the carbid-cup is concave, as shown, and the wings E ofthe nut E are narrow, so that they may lie above the plane of the bottomto allow the lamp to stand upright when not in use upon the bicycle;

Modifications maybe made in the forms and proportions, and parts of theinvention may be used without the whole.

Although I have described the invent-ion as carried out in abicycle-lamp,it will be understood that it may be embodied in otherforms.

I claim- 1. In an acetylene-lamp, a water-chamber, a carbid-cup fittingthereto, a water-supply tube extending downwardly from said chamher intosaid cup, and means for separably attaching the latter to said tube, allcombined substantially as herein specified.

2. In an acetylene-lamp, a water-chamber, a carbid-cup fitting thereto,a water-supply tube extending downwardly from said chamber into said cupand screw-threaded at the lower end, and a nut operated from below saidcup and extending through the bottom thereof, adapted separably toattach the cup to said chamber, all combined substantially as hereinspecified.

3. In an acetylene-lamp, a water-chamber, a carbid-cup fitting thereto,a water-supply tube extending from said chamber downwardly into saidcup, a valve located in said tube, a tubular nut operated from belowsaid cup and extending through the bottom of the latter, adaptedseparably to attach the cup to said chamber and also serve indistributing the water passing said valve,'all combined substantially asherein specified.

V 4. In an acetylene-lamp, the water-chamber A, having the extension A,the carbidcup B adapted to fit against said extension, and having anaperture in its bottom, a water-supply tube D extending from saidchamber into said cup, and screw-threaded at its lower end, and thetubular nut E having the distributing-openings 6, adapted to engage saidtube through said apertures and force the cup into close contact withsaid extension, all combined substantially as herein specified.

5. The water-chamber A and extension A therein, the gasket F carriedthereby, the carbid-cup, B, having an aperture in the bottom, awater-supply tube D, screw-threaded at the lower end, extendingdownwardly from said chamber into said cup, and having a Valve-seat d,the tubular nut E having the groove 6 and distributing-openings 2'there* in, adapted to engage said tube through said apertures andprotecting means as the string 2 lying in said groove, all combined andarranged to serve substantially as, and for the purposes hereinspecified.

6. In an acetylene-lamp, a carbid-cup serving as a gas-chamber, awater-chamber, a water-supply tube extending therefrom into said cup, avalve-seat at the lower end of said tube and a valve-rod and pluginclosed therein, in combination with the flange G having the notches gon the upper end of said rod, the ring H and its spur H adapted toengage one of said notches, the arm H and spring II on said ring, therelatively-fixed flange D having notches (Z and stops (1 01 adapted toengage said spring, and the nutJ for holding said ring in place, allsubstantially as herein specified.

In testimony that I claim the invention above'set forth I affix mysignature in presence of two witnesses.

WILLIAM P. (JRARY.

Witnesses:

CHARLES R. SEARLE, HARRY E. CARRINGTON.

